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Lastly, Alpha cards have rounded corners

So why Elspeth, Knight Errant

Since it also works with Pendulum Monsters that happen to be in the Graveyard, this card is quite flexible

So there you have it

The fact that it replaces itself and doesnt put you down on resources makes it also playable in the main deck with creatures like Deaths Shadow or Kroxa, Titan of Deaths Hunger

If your opponent controls a monster: You can Special Summon this card from your hand, then take 1 "Cyber Dragon" from your Deck, and either Special Summon it or equip it to this card as an Equip Spell, also you cannot Special Summon for the rest of this turn, except Machine monsters